Frame house: types of pairing the rafters in ridge

Before we talk about pairing the rafters, it is necessary to uncover the meaning of the terms used:

— mauerlat - timber, which is laid on a supporting wall, attached to it at the bottom of the rafters;
— rafter foot - the same as the rafter;
— tightening - special timber, which connects the two rafters to make the design more rigidity;
— Brace and help - Special items that are set for greater stiffness of the whole structure;
— Rack - Backs ridge pole;
— Sill - a bar, mounted on the load-bearing walls in the apex.

types of rafters

Roof trusses are two kinds:

Hanging rafters - based on 2 points on mauerlat on the horse, there is no intermediate props. Durability of compounds in this structure is achieved by puffs connecting the rafters below. If you must use an attic space as an attic, then tightening installed at the base of rafter.

Naslonnye rafters - are additional fasteners are used: the rack, struts to give the design a special strength.

Methods of conjugation rafters in the ridge:

— Overlapping.

In this design the rafter on the ridge connected overlap and are attached with bolts or nails. This is a very popular technology today. The frame construction is often spliced ​​overlapping rafters using cutting vpoldereva. Typically, the method is used for overlapping installation of roofs where there is no great demands on the strength of the rafter construction.
— butt. In this design rafters are joined end to end on the ridge, distributing most of the load evenly. It is very important to accurately fit the rafters so that they are tightly pressed against each other. Angle joint should be The correlation with the angle of slope of the roof. Therefore, all the best cuts to make a pattern. Particular attention should be paid to the mount. Lushe addition of simple nails to use additional methods of fixing.
— Compound on board. With this connection established ridge beam to which are fastened rafters. Advantages of the design is that the timber can be mounted on the backup, and then safely install all the rafters. This compound is best used when it is necessary to block the wide roof. For this method there is no need to make templates, are not afraid of possible differences in size. The design is very robust, its main disadvantage is that here we can not use the attic as an additional room. Alternatively, the compound may for beams with a small notch trusses. For better stop excavation done on mauerlat.

fasteners

traditional fasteners in Soviet times was used for fixing the roof system that can be used Today: pads of various kinds, bars, pins, metal, wooden and steel wedges, wooden pins and steel brackets.

Modern industry offers a more reliable, simple and functional ways of fixing the rafters:

- nailing, and perforated plates. This is a very secure fit, but to use it you need to buy a special press.
- Bolting.
- Self-tapping screws.
- Metal corners and plates.

In the next article, we will compare and rolled slab insulation.